Abstract
The effects of different ratios of dietary raw to pre-gelatinized starch on the growth performance, feed utilization and body composition of juvenile yellowfin seabream (Sparus latus) were evaluated during a 10-week growth trial. Five isonitrogenous, semi-purified diets containing 200 g kg−1 starch comprising different ratios of raw to pre-gelatinized starch [(in g kg−1)100:100 (diet 1), 150:50 (diet 2), 50:150 (diet 3), 200:0 (diet 4), 0:200 (diet 5), raw:pre-gelatinized] were prepared and fed to triplicate groups of juvenile S. latus. Our results showed that fish fed diet 4 (200 g kg−1 raw starch) had the highest weight gain and specific growth rate, followed by those fed diet 2, diet 1, diet 3 and diet 5. Feed efficiency, protein efficiency ratio and protein productive value in the fish on diets 4 and diet 2, respectively, were significantly higher than those on diets 3 and diet 5, respectively. Body and muscle compositions were unaffected by the different dietary raw to pre-gelatinized starch ratios. Values of hepatosomatic index, intraperitoneal fat ratio, viscerosomatic index and condition factor did not vary among experimental treatments. Plasma indices showed variations, but these were not relative to dietary treatments. In conclusion, the partial or total replacement of raw starch by pre-gelatinized starch in diets for yellowfin seabream did not improve its growth performance and feed utilization.
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Acknowledgments
This work was funded by Science and Technology Bureau (grant no. 2004-33210-4205058), Zhuhai, P. R. China. The authors thank Wu, H.-Y., Ling, Z. X. Shen, N. L. and Deng, S. X. for their helps in sampling.
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Wu, XY., Liu, YJ., Tian, LX. et al. Effect of different dietary raw to pre-gelatinized starch ratios on growth performance, feed utilization and body composition of juvenile yellowfin seabream (Sparus latus). Aquacult Int 15, 467–477 (2007). https://doi.org/10.1007/s10499-007-9113-2
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DOI: https://doi.org/10.1007/s10499-007-9113-2